Highest Compression Ratio

[TT_NS]

Since my car got stolen I thought id get back on the horse and build a N/T Engine. But i was curious what would be the highest C/R i could use on the engine? I was planning on using the engine block of a turbo module so i could have the extra oil squerters . I want to stroke it to a 2.4 put the eagle rods on it (incase id like some No2 ) with some forged pistons. im not sure what compression id like to use yet. I want to put a 264 Exhuast cam on it to not sure about the intake one yet. And of cores an FMU. But what do you guys think about the C/R? Thanks for your help

 

[Hammer_Gaidin]

If you are planning on doing a built...there is no reason not to do a turbo one...n/a will never come close....

 

[TT_NS]

If you are planning on doing a built...there is no reason not to do a turbo one...n/a will never come close....

Yea thanks for your help...
Already did that and my car got stolen i want to do something different with No2.
Answere the question.

 

[jasteel13]

Since my car got stolen I thought id get back on the horse and build a N/T Engine. But i was curious what would be the highest C/R i could use on the engine? I was planning on using the engine block of a turbo module so i could have the extra oil squerters . I want to stroke it to a 2.4 put the eagle rods on it (incase id like some No2 ) with some forged pistons. im not sure what compression id like to use yet. I want to put a 264 Exhuast cam on it to not sure about the intake one yet. And of cores an FMU. But what do you guys think about the C/R? Thanks for your help

????.... my eyes are bleeding... usually i dont bash but not quite sure what to think of this one...

 

[dsm-onster]

Just answer this guy's question. or go to another thread. Obviously he cares little of the "forced induction is best" opinion. Not flaming. It's just that you all are breaking the posting regulations.

 

[VelocitàPaola]

JE only makes pistons with a 8.5:1 compression ratio for the 4G63s (stroked and non-stroked).

Wiseco has has pistons up to 9.3:1 for the 4G64 block with a 4G63 head (basically the same effect as a stroked 4G63 block), or 8.75:1 for a 4G63 with a stroker crank.

Here's a complete listing of their Mitsubishi pistons:
http://www.wiseco.com/PDFs/Catalogs/SC06_Mitsubishi.pdf

You'll only be able to get about 8.5:1 with Ross pistons.

In the end, it'll probably come down to what pistons are available, rather than what C/R the engine can handle. Since the 4G63 was primarily designed as a turbocharged car, most piston you'll find for it have a lower C/R.

If worse comes to worse, and you have the money, both Ross and JE make custom pistons.

In case you didn't already know, the stock 1G N/Ts came with a compression ratio of 9.0:1 - and I wouldn't recommend using them (cast pistons don't mix well with lots of nitrous).

 

[jasteel13]

its not that.. its stupid uneducated questions...

he wants to go n/a but he will make sure he has an fmu...

 

[jasteel13]

JE only makes pistons with a 8.5:1 compression ratio for the 4G63s (stroked and non-stroked).

Wiseco has has pistons up to 9.3:1 for the 4G64 block with a 4G63 head (basically the same effect as a stroked 4G63 block), or 8.75:1 for a 4G63 with a stroker crank.

Here's a complete listing of their Mitsubishi pistons:
http://www.wiseco.com/PDFs/Catalogs/SC06_Mitsubishi.pdf

You'll only be able to get about 8.5:1 with Ross pistons.

In the end, it'll probably come down to what pistons are available, rather than what C/R the engine can handle. Since the 4G63 was primarily designed as a turbocharged car, most piston you'll find for it have a lower C/R.

If worse comes to worse, and you have the money, both Ross and JE make custom pistons.

In case you didn't already know, the stock 1G N/Ts came with a compression ratio of 9.0:1 - and I wouldn't recommend using them (cast pistons don't mix well with lots of nitrous).

I know what I'm doing. I'm going through with a build. It would be nice to have a straight shot into the intake and not have that big monster in the way. I'm building a stroked 2.3 with 13:1 C/R.

well i guess he decided....

 

[VelocitàPaola]

its not that.. its stupid uneducated questions...

he wants to go n/a but he will make sure he has an fmu...

Haha. That's true; FMUs are sensitive to boost, not vacuum. So maybe he has a little reading-up to do when it comes to fuel systems...

 

[TT_NS]

You can order custom pistons from sertain retailers that get them from wiseco and ross. I got a quot on some 13:1 comp pistons for around $450-$500.

and it ant an uneducated question. I want to be able to richen up the fuel mixture because with high compression it could start to knock. Plus you get more power out of richer mixtures. I just used FMU to distinguish what ever i was going to use to adjust A/F ratio.

 

[jasteel13]

You can order custom pistons from sertain retailers that get them from wiseco and ross. I got a quot on some 13:1 comp pistons for around $450-$500.

and it ant an uneducated question. I want to be able to richen up the fuel mixture because with high compression it could start to knock. Plus you get more power out of richer mixtures. So get your facts strait.

get my facts straight??????? hmm last time i checked it takes pressure to make an FMU operate... do you plan on reaching boost on an N/A sprayed motor?

if you want to richen it up.. use a stand alone, fpr, bigger injectors... something that would work not an FMU

 

[TT_NS]

Thinking more of an AFC or something along those lines... be kinda dumb to put a standalone on a N/A car dont you think

 

[jasteel13]

Thinking more of an AFC or something along those lines... be kinda dumb to put a standalone on a N/A car dont you think

no it would be dumb to put an FMU on a N/A car....

why would a standalone be stupid... you can add fuel/timing thru the map...

but do what you think is best good luck

 

[TT_NS]

Thank you.

I wouldent put an Standalone on it cuzz that alone cost the same as it would to do the build to my car. id would be just cheaper to get an apex.

 

[boostedinaz]

Plus you get more power out of richer mixtures.

You have a lot to learn and that is what I suggest you do before going and buying these parts for your pipe dream. Running lean makes more power as far as mixture goes, but ingesting more air AND fuel in the correct mixture will make the best power.

Either way good luck.

 

[TT_NS]

look at my profile. iv built something just a little more complicated then this. i think i know something

 

[jasteel13]

honestly.. you dont know anything... i would let this go if you didnt think you knew everything... i have no problem with people asking questions to learn things, but you think you know everything but in all actuallity you are wrong...

plus he is right.. the leaner you can get without blowing up the car the more power you will make..

 

[boostedinaz]

look at my profile. iv built something just a little more complicated then this. i think i know something

You keep saying that in a lot of your post, but then when I actually read through them there is a LOT that is wrong.

Good luck with you poor attitude I doubt you will find much more help. Those of us that have been there and done that give out advice and all you do is tell us you know what you are doing. If you did you wouldn't be here asking questions. Oh well.

 

[GVR4592]

You can't stroke a 2.0 block to 2.4. An FMU raises fuel pressure with BOOST. It will raise it some but nothing like it would with positive pressure. You never use a cam designed for a turbocharged engine in a N/A application and vice versa. If you really are serious about this you will need custom ground cams. As for the compression ratio, you should contact a piston manufacturer and get their opinion. Higher compression isn't always better, you can run into severe detonation problems if the piston has to large of a dome. Then after you do all of the research you will probably decide that it's not worth the cost and the work.

 

[staticbrainwash]

Apparently spelling is no longer a major issue. YAY public school!

To the issue at hand, an safc would be fine as long as you do not exceed 650(ish)cc injectors. If you want more fuel than that, you'll need a standalone or a burned eprom. (not really sure if NA's came with eproms though)

As for pistons, you can get custom CR's all day long. But you need to plan out HP goals, NO2 shot size, cams, ect. You can't just throw in 2938329:1 CR pistons and expect everything to flow properly.

Get together a plan and then maybe we can help.

 

[OneGeeAWD]

look at my profile. iv built something just a little more complicated then this. i think i know something

yea obviously you know how to copy and paste. half that shit in your profile is right off Slowboys website. what a ####in joke

 

[TT_NS]

yea obviously you know how to copy and paste. half that shit in your profile is right off Slowboys website. what a ####in joke

yea well search some of my posts iv talked about it plenty plus one has pics in it.

 

[GILZTSIAWD]

yea well search some of my posts iv talked about it plenty plus one has pics in it.

So even if you really do have that, whats so complicated about it? The part about adding it to your shopping cart from sbr, filling out the buyer information, or paying through paypal?

 

[TT_NS]

So even if you really do have that, whats so complicated about it? The part about adding it to your shopping cart from sbr, filling out the buyer information, or paying through paypal?

how about the part where i spent 2 years working saving the money to build that engine. Then as the pay checks came in and i got the parts i did all the work my self, then to wait 3 weeks after it starts running for it to get stolen.

 

[staticbrainwash]

HAHA, That is from slowboys site. Nice dude, great copy job.

Not to mention he never answered why he went with a 2.3 over a 2.4. If he were a real builder he'd speak up.

Oh wait, that was his other thread asking if he could wire a gf-maft into a 1g NA. Sorry, i can't tell one rediculous post from the other.